Island



' U ITED STATES PATENT OFFICE.

HENRY W. VAUGHAN, OF PROVIDENGE, RHODE ISLAND, ASSIGNOR 'IO JOHN W. SLATER, OF SAME PLACE.

PROCESS OF DYEING.

SPECIFICATION forming part of Letters Patent No. 242,081, dated May 24, 1881.

Application filed March 5, 1881. (N0 specimens.)

To all whom it may concern:

numbered 223,019; and it consists in subjecting the material,'ai'ter it has received its color by the mode described in said patent, to the process of steaming, for the purpose of setting the color and fixing it.

By the process described in my said former patent a powder consisting of infusorial earth or other suitable vehicle charged with coloringmatter and with an oleaginous constituent is meeh anicall y incorporated into the fibrous material by the sequence of operations performed in manufacturing the same into yarn.

I have discovered that if the fibrous material which has been so colored is subjected to the process of steaming, in the manner similar .to that which is generally practiced in cotton and woolen nanufactories for steaming yarns, the result will be that the coloring-matter which is contained in the powder-vehicle will separate from it, and, becoming of a darker shade, form a dye which impregnates the yarn, whereby it becomes firmly fixed therein and made as fast as colors obtained by the ordinary methods of dyeing with the same coloring materials.

My present invention consists in steaming the fibrous material after it has been treated substantially according to my said Patent N 0. 223,019, for the distribution of the coloringma-tter while in a dry state superficially upon the fibrous material. By this additional step of steaming the dry color is converted into a true dye.

The directions contained in my said former patent, to which I herein refer, are sufficient to enable the color-charged powder to be mechanically incorporated with the fibrous material, and the process of steaming yarn is one which is so well known and generally practiced as to require no special description.

I prefer to apply the steaming process to the fibrous material after it has been manufactured into yarn and wound into cops; but it can be employed at any prior stage in the progress of the manufacture of the fibrous material after the color-charged powder has become thoroughly distributed and incorporated into the fiber; or, if preferred, the steaming process can be employed after the yarn has been knit or woven into fabrics.

What I claim as my invention, and desire to secure by Letters Patent, is-- The herein-described process of fixing dyes or coloring-matters by steaming fibrous material which has previously been superficially colored by impregnation with a (lr 1),Q,W.(ler charged with color and an oleaginoiis constituent.

H. W. VAUGHAN.

Witnesses:

' \V. H. THURSION,

I. KNIGHT. 

